Merge PST Files without Duplicate: Ultimate Guide

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To merge PST files in Outlook without duplicates, you can use either manual methods or specialized software. Here’s a detailed overview of both approaches:

Manual Method Using Outlook​

Step 1: Create a New PST File​

1. Open Microsoft Outlook.
2. Go to File > New Items > More Items > Outlook Data File.
3. Choose a location to save the new PST file, provide a name, and click OK.

Step 2: Import Old PST Data​

1. Navigate to File > Open & Export > Import/Export.
2. Select Import from another program or file and click Next.
3. Choose Outlook Data File (.pst) and click Next.
4. Browse to select the old PST file you want to merge.
5. In the import options, select Do not import duplicates and ensure that the option to include subfolders is checked.
6. Click Finish to complete the import.

Repeat this process for each PST file you want to merge into the newly created PST file while ensuring you select the option to avoid duplicates each time.

Automated Method Using PST Merge Tools​

For a more efficient and user-friendly experience, consider using specialized software designed for merging PST files while eliminating duplicates. Here are some popular tools:

• Download and install the Cigati PST Merge Tool.
• Click on the Add PST Files button to select multiple PST files.
• Choose the merge options and specify a location for the new merged PST file.
• Check options like Remove Duplicate & Exclude Deleted Items, then click Next to start the merging process.

Conclusion​

While manual methods are available, they can be tedious, especially when dealing with multiple files. Automated tools not only streamline the process but also significantly reduce the risk of duplicates, making them a recommended choice for efficiently merging Outlook PST files without losing data integrity.